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Fix for LP BUG#910123 MariaDB 5.3.3 causes 1093 error on Drupal

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Problem was that now we can merge derived table (subquery in the FROM clause).
Fix: in case of detected conflict and presence of derived table "over" the table which cased the conflict - try materialization strategy.
This commit is contained in:
unknown 2012-02-14 16:52:56 +02:00
commit 764eeeee74
7 changed files with 82 additions and 8 deletions
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10
mysql-test/t/derived_opt.test
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@ -202,5 +202,15 @@ RIGHT JOIN (
drop table t1,t2,t3,t4;
--echo #
--echo # LP BUG#910123 MariaDB 5.3.3 causes 1093 error on Drupal
--echo # Fix: force materialization in case of conflict
--echo #
SET optimizer_switch='derived_merge=on';
CREATE TABLE t1 ( i INT );
INSERT INTO t1 VALUES ( (SELECT 1 FROM ( SELECT * FROM t1 ) as a) );
drop table t1;
set optimizer_switch=@save_optimizer_switch;
# The following command must be the last one the file
set optimizer_switch=@exit_optimizer_switch;